Diseases & ConditionsAdjustment disorderAdjustment disorder is a group of symptoms, such as stress, feeling sad or hopeless, and physical symptoms that can occur after you go through a stressful life event. The symptoms occur because you are...

Diseases & ConditionsAgoraphobiaAgoraphobia is an intense fear and anxiety of being in places where it is hard to escape, or where help might not be available. Agoraphobia usually involves fear of crowds, bridges, or of being outside...

Diseases & ConditionsAlcohol use disorderAlcohol use disorder is when your drinking causes serious problems in your life, yet you keep drinking. You may also need more and more alcohol to feel drunk. Stopping suddenly may cause withdrawal symptoms...

Diseases & ConditionsAnorexiaAnorexia is an eating disorder that causes people lose more weight than is considered healthy for their age and height. People with this disorder may have an intense fear of weight gain, even when they...

Diseases & ConditionsAntisocial personality disorderAntisocial personality disorder is a mental condition in which a person has a long-term pattern of manipulating, exploiting, or violating the rights of others. This behavior is often criminal.

Diseases & ConditionsAttention deficit hyperactivity disorderAttention deficit hyperactivity disorder (ADHD) is a problem caused by the presence of 1 or more of these findings: not being able to focus, being overactive, or not being able control behavior.

Diseases & ConditionsAutism spectrum disorderAutism spectrum disorder (ASD) is a developmental disorder. It often appears in the first 3 years of life. ASD affects the brain's ability to develop normal social and communication skills.

Diseases & ConditionsAvoidant personality disorderAvoidant personality disorder is a mental condition in which a person has a lifelong pattern of feeling very: ShyInadequateSensitive to rejection Shy Inadequate Sensitive to rejection

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Diseases & ConditionsBipolar disorder Bipolar disorder is a mental condition in which a person has wide or extreme swings in their mood. Periods of feeling sad and depressed may alternate with periods of being very happy and active or being...

Diseases & ConditionsBorderline personality disorderBorderline personality disorder (BPD) is a mental condition in which a person has long-term patterns of unstable or turbulent emotions. These inner experiences often result in impulsive actions and chaotic...

Diseases & ConditionsBrief psychotic disorderBrief psychotic disorder is a sudden, short-term display of psychotic behavior, such as hallucinations or delusions, which occurs with a stressful event. hallucinations

Diseases & ConditionsBulimiaBulimia is an eating disorder in which a person has regular episodes of eating a very large amount of food (bingeing) during which the person feels a loss of control over eating. The person then uses different...

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Diseases & ConditionsCompulsive gamblingCompulsive gambling is being unable to resist impulses to gamble. This can lead to severe money problems, job loss, crime or fraud, and damage to family relationships.

Diseases & ConditionsConduct disorderConduct disorder is a set of ongoing emotional and behavioral problems that occurs in children and teens. Problems may involve defiant or impulsive behavior, drug use, or criminal activity.

Diseases & ConditionsConversion disorderConversion disorder is a mental condition in which a person has blindness, paralysis, or other nervous system (neurologic) symptoms that cannot be explained by medical evaluation.

Diseases & ConditionsCyclothymic disorderCyclothymic disorder is a mental disorder. It is a mild form of bipolar disorder (manic depressive illness), in which a person has mood swings over a period of years that go from mild depression to emotional...

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Diseases & ConditionsDependent personality disorderDependent personality disorder is a mental condition in which people depend too much on others to meet their emotional and physical needs.

Diseases & ConditionsDepression - older adultsDepression is a mental health condition. It is a mood disorder in which feelings of sadness, loss, anger, or frustration interfere with daily life for weeks or longer. Depression in older adults is a widespread...

Diseases & ConditionsGender dysphoriaGender dysphoria occurs when there is a conflict between a person's physical gender and the gender he or she identifies with. For example, a person who is physically a boy may actually feel and act like...

Diseases & ConditionsGeneralized anxiety disorderGeneralized anxiety disorder (GAD) is a mental disorder in which a person is often worried or anxious about many things and finds it hard to control this anxiety.

Diseases & ConditionsGriefGrief is a reaction to a major loss of someone or something. It is most often an unhappy and painful emotion.

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Diseases & ConditionsHistrionic personality disorderHistrionic personality disorder is a mental condition in which people act in a very emotional and dramatic way that draws attention to themselves.

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Diseases & ConditionsIllness anxiety disorderIllness anxiety disorder is a preoccupation that physical symptoms are signs of a serious illness, even when there is no medical evidence to support the presence of an illness.

Diseases & ConditionsInsomnia - overviewInsomnia is trouble falling asleep, staying asleep through the night, or waking up too early in the morning. Episodes of insomnia may come and go or be long-lasting. The quality of your sleep is as important...

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Diseases & ConditionsMajor depressionDepression is feeling sad, blue, unhappy, or down in the dumps. Most people feel this way once in a while. Major depression is a mood disorder. It occurs when feelings of sadness, loss, anger, or frustration...

Diseases & ConditionsMajor depression with psychotic featuresMajor depression with psychotic features is a mental disorder in which a person has depression along with loss of touch with reality (psychosis).

Diseases & ConditionsMathematics disorderMathematics disorder is a condition in which a child's math ability is far below normal for their age, intelligence, and education.

Diseases & ConditionsMedicines for ADHDADHD is a problem that most often affects children. Adults may be affected as well. People with ADHD may have problems with: Being able to focusBeing over-activeNot being able to control behavior Being...

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Diseases & ConditionsNarcissistic personality disorderNarcissistic personality disorder is a mental condition in which a person has: An excessive sense of self-importanceAn extreme preoccupation with themselvesA lack of empathy for others An excessive sense...

Diseases & ConditionsNicotine and tobaccoThe nicotine in tobacco can be addictive like alcohol, cocaine, and morphine.

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Diseases & ConditionsObsessive-compulsive disorderObsessive-compulsive disorder (OCD) is a mental disorder in which people have unwanted and repeated thoughts, feelings, ideas, sensations (obsessions), and behaviors that drive them to do something over...

Diseases & ConditionsObsessive-compulsive personality disorderObsessive-compulsive personality disorder (OCPD) is a mental condition in which a person is preoccupied with: RulesOrderlinessControl Rules Orderliness Control

Diseases & ConditionsPanic disorderPanic disorder is a type of anxiety disorder in which you have repeated attacks of intense fear that something bad will happen.

Diseases & ConditionsParanoid personality disorderParanoid personality disorder is a mental condition in which a person has a long-term pattern of distrust and suspicion of others. The person does not have a full-blown psychotic disorder, such as schizophrenia...

Diseases & ConditionsPersistent depressive disorderPersistent depressive disorder is a chronic (ongoing) type of depression in which a person's moods are regularly low. But, symptoms are not as severe as with major depression. chronic Persistent depressive...

Diseases & ConditionsPersonality disordersPersonality disorders are a group of mental conditions in which a person has a long-term pattern of behaviors, emotions, and thoughts that is very different from his or her culture's expectations. These...

Diseases & ConditionsPhobia - simple/specificA phobia is an ongoing intense fear or anxiety of a certain object, animal, activity, or setting that poses little to no actual danger.

Diseases & ConditionsPhonological disorderPhonological disorder is a type of speech disorder known as an articulation disorder. Children with phonological disorder do not use some or all of the speech sounds expected for their age group.

Diseases & ConditionsPicaPica is a pattern of eating non-food materials, such as dirt or paper.

Diseases & ConditionsPost-traumatic stress disorderPost-traumatic stress disorder (PTSD) is a type of anxiety disorder. It can occur after you have gone through an extreme emotional trauma that involved the threat of injury or death. anxiety disorder

Diseases & ConditionsPsychosisPsychosis occurs when a person loses contact with reality. The person may: Have false beliefs about what is taking place, or who one is (delusions)See or hear things that are not there (hallucinations)...

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Diseases & ConditionsRumination disorderRumination disorder is a condition in which a person keeps bringing up food from the stomach into the mouth (regurgitation) and rechewing the food.

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Diseases & ConditionsSchizoaffective disorderSchizoaffective disorder is a mental condition that causes both a loss of contact with reality (psychosis) and mood problems (depression or mania). psychosis

Diseases & ConditionsSchizoid personality disorderSchizoid personality disorder is a mental condition in which a person has a lifelong pattern of indifference to others and social isolation.

Diseases & ConditionsSchizophreniaSchizophrenia is a mental disorder that makes it hard to tell the difference between what is real and not real. It also makes it hard to think clearly, have normal emotional responses, and act normally...

Diseases & ConditionsSchizotypal personality disorderSchizotypal personality disorder is a mental condition in which a person has trouble with relationships and disturbances in thought patterns, appearance, and behavior.

Diseases & ConditionsSeasonal affective disorderSeasonal affective disorder (SAD) is a type of depression that occurs at a certain time of the year, usually in winter.

Diseases & ConditionsSelective mutismSelective mutism is a condition in which a child can speak, but then they suddently stop speaking. It most often takes place in school or social settings.

Diseases & ConditionsSocial anxiety disorderSocial anxiety disorder is a persistent and irrational fear of situations that may involve scrutiny or judgment by others, such as at parties and other social events.

Diseases & ConditionsSomatic symptom disorderSomatic symptom disorder occurs when a person feels extreme anxiety about physical symptoms such as pain or fatigue. The person has intense thoughts, feelings, and behaviors related to the symptoms that...

Diseases & ConditionsSubstance use disorderSubstance use disorder occurs when a person's use of alcohol or another substance (drug) leads to health issues or problems at work, school, or home. This disorder is also called substance abuse.

Diseases & ConditionsSuicide and suicidal behaviorSuicide is the act of taking one's own life on purpose. Suicidal behavior is any action that could cause a person to die, such as taking a drug overdose or crashing a car on purpose.

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Diseases & ConditionsTrichotillomaniaTrichotillomania is hair loss from repeated urges to pull or twist the hair until it breaks off. People are unable to stop this behavior, even as their hair becomes thinner.

Special TopicsIQ testingIQ (intelligence quotient) testing is a series of exams used to determine your general intelligence in relation to other people the same age.

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Special TopicsLearn to manage stressWe all feel stress at one time or another. It's a normal and healthy reaction to change or a challenge. But stress that goes on for more than a few weeks can affect your health. Keep stress from making...

Special TopicsOrgasmic dysfunctionOrgasmic dysfunction is when a woman either cannot reach orgasm, or has trouble reaching orgasm when she is sexually excited. When sex is not enjoyable, it can become a chore instead of a satisfying, intimate...

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Special TopicsRape (sexual assault) - overview
Rape is defined as a sexual act forced on a person against his or her will. It may involve physical force or the threat of force. It may also be done against someone who is unable to give consent. Sexual...

Special TopicsSubstance useSubstance use is the continued use of alcohol, illegal drugs, or the misuse of prescription or over-the-counter drugs with negative consequences. These consequences may involve: Substance use Problems at...

Diseases & ConditionsAdjustment disorderAdjustment disorder is a group of symptoms, such as stress, feeling sad or hopeless, and physical symptoms that can occur after you go through a stressful life event. The symptoms occur because you are...

SymptomsAgitationAgitation is an unpleasant state of extreme arousal. An agitated person may feel stirred up, excited, tense, confused, or irritable.

Diseases & ConditionsAgoraphobiaAgoraphobia is an intense fear and anxiety of being in places where it is hard to escape, or where help might not be available. Agoraphobia usually involves fear of crowds, bridges, or of being outside...

Diseases & ConditionsAlcohol use disorderAlcohol use disorder is when your drinking causes serious problems in your life, yet you keep drinking. You may also need more and more alcohol to feel drunk. Stopping suddenly may cause withdrawal symptoms...

In-depth ReportAlcohol use disordersAn in-depth report on the causes, diagnosis, and treatment of alcoholism.

Diseases & ConditionsAnorexiaAnorexia is an eating disorder that causes people lose more weight than is considered healthy for their age and height. People with this disorder may have an intense fear of weight gain, even when they...

Diseases & ConditionsAntisocial personality disorderAntisocial personality disorder is a mental condition in which a person has a long-term pattern of manipulating, exploiting, or violating the rights of others. This behavior is often criminal.

Diseases & ConditionsAttention deficit hyperactivity disorderAttention deficit hyperactivity disorder (ADHD) is a problem caused by the presence of 1 or more of these findings: not being able to focus, being overactive, or not being able control behavior.

Diseases & ConditionsAutism spectrum disorderAutism spectrum disorder (ASD) is a developmental disorder. It often appears in the first 3 years of life. ASD affects the brain's ability to develop normal social and communication skills.

Diseases & ConditionsAvoidant personality disorderAvoidant personality disorder is a mental condition in which a person has a lifelong pattern of feeling very: ShyInadequateSensitive to rejection Shy Inadequate Sensitive to rejection

Diseases & ConditionsBipolar disorder Bipolar disorder is a mental condition in which a person has wide or extreme swings in their mood. Periods of feeling sad and depressed may alternate with periods of being very happy and active or being...

Diseases & ConditionsBorderline personality disorderBorderline personality disorder (BPD) is a mental condition in which a person has long-term patterns of unstable or turbulent emotions. These inner experiences often result in impulsive actions and chaotic...

Diseases & ConditionsBrief psychotic disorderBrief psychotic disorder is a sudden, short-term display of psychotic behavior, such as hallucinations or delusions, which occurs with a stressful event. hallucinations

Diseases & ConditionsBulimiaBulimia is an eating disorder in which a person has regular episodes of eating a very large amount of food (bingeing) during which the person feels a loss of control over eating. The person then uses different...

Diseases & ConditionsCompulsive gamblingCompulsive gambling is being unable to resist impulses to gamble. This can lead to severe money problems, job loss, crime or fraud, and damage to family relationships.

Diseases & ConditionsConduct disorderConduct disorder is a set of ongoing emotional and behavioral problems that occurs in children and teens. Problems may involve defiant or impulsive behavior, drug use, or criminal activity.

Diseases & ConditionsConversion disorderConversion disorder is a mental condition in which a person has blindness, paralysis, or other nervous system (neurologic) symptoms that cannot be explained by medical evaluation.

Diseases & ConditionsCyclothymic disorderCyclothymic disorder is a mental disorder. It is a mild form of bipolar disorder (manic depressive illness), in which a person has mood swings over a period of years that go from mild depression to emotional...

Diseases & ConditionsDependent personality disorderDependent personality disorder is a mental condition in which people depend too much on others to meet their emotional and physical needs.

In-depth ReportDepressionAn in-depth report on the causes, diagnosis, treatment, and prevention of depression.

Diseases & ConditionsDepression - older adultsDepression is a mental health condition. It is a mood disorder in which feelings of sadness, loss, anger, or frustration interfere with daily life for weeks or longer. Depression in older adults is a widespread...

SymptomsDepression - overviewDepression may be described as feeling sad, blue, unhappy, miserable, or down in the dumps. Most of us feel this way at one time or another for short periods. Clinical depression is a mood disorder in which...

Self-Care InstructionsDepression - stopping your medicinesAntidepressants are prescription medicines you may take to help with depression, anxiety, or pain. Like any medicine, there are reasons you may take antidepressants for a while and then consider no longer...

SurgeryElectroconvulsive therapyElectroconvulsive therapy (ECT) uses an electric current to treat depression and some other mental illnesses. depression

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Diseases & ConditionsGender dysphoriaGender dysphoria occurs when there is a conflict between a person's physical gender and the gender he or she identifies with. For example, a person who is physically a boy may actually feel and act like...

Diseases & ConditionsGeneralized anxiety disorderGeneralized anxiety disorder (GAD) is a mental disorder in which a person is often worried or anxious about many things and finds it hard to control this anxiety.

Diseases & ConditionsHistrionic personality disorderHistrionic personality disorder is a mental condition in which people act in a very emotional and dramatic way that draws attention to themselves.

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Special TopicsIQ testingIQ (intelligence quotient) testing is a series of exams used to determine your general intelligence in relation to other people the same age.

Diseases & ConditionsIllness anxiety disorderIllness anxiety disorder is a preoccupation that physical symptoms are signs of a serious illness, even when there is no medical evidence to support the presence of an illness.

In-depth ReportInsomnia
An in-depth report on the causes, diagnosis, treatment, and prevention of insomnia.

Diseases & ConditionsInsomnia - overviewInsomnia is trouble falling asleep, staying asleep through the night, or waking up too early in the morning. Episodes of insomnia may come and go or be long-lasting. The quality of your sleep is as important...

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Special TopicsLearn to manage stressWe all feel stress at one time or another. It's a normal and healthy reaction to change or a challenge. But stress that goes on for more than a few weeks can affect your health. Keep stress from making...

Diseases & ConditionsMajor depressionDepression is feeling sad, blue, unhappy, or down in the dumps. Most people feel this way once in a while. Major depression is a mood disorder. It occurs when feelings of sadness, loss, anger, or frustration...

Diseases & ConditionsMajor depression with psychotic featuresMajor depression with psychotic features is a mental disorder in which a person has depression along with loss of touch with reality (psychosis).

Self-Care InstructionsManaging your depression - teensDepression is a serious medical condition that you need help with until you feel better. Know that you are not alone. 1 in 5 teenagers will be depressed at some point. Luckily, there are ways to get treatment...

Diseases & ConditionsMathematics disorderMathematics disorder is a condition in which a child's math ability is far below normal for their age, intelligence, and education.

Diseases & ConditionsMedicines for ADHDADHD is a problem that most often affects children. Adults may be affected as well. People with ADHD may have problems with: Being able to focusBeing over-activeNot being able to control behavior Being...

TestsMental status testingMental status testing is done to check a person's thinking ability, and to determine if any problems are getting better or worse. It is also called neurocognitive testing.

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Diseases & ConditionsNarcissistic personality disorderNarcissistic personality disorder is a mental condition in which a person has: An excessive sense of self-importanceAn extreme preoccupation with themselvesA lack of empathy for others An excessive sense...

Diseases & ConditionsNicotine and tobaccoThe nicotine in tobacco can be addictive like alcohol, cocaine, and morphine.

SymptomsNightmaresA nightmare is a bad dream that brings out strong feelings of fear, terror, distress, or anxiety. anxiety

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Diseases & ConditionsObsessive-compulsive disorderObsessive-compulsive disorder (OCD) is a mental disorder in which people have unwanted and repeated thoughts, feelings, ideas, sensations (obsessions), and behaviors that drive them to do something over...

Diseases & ConditionsObsessive-compulsive personality disorderObsessive-compulsive personality disorder (OCPD) is a mental condition in which a person is preoccupied with: RulesOrderlinessControl Rules Orderliness Control

Special TopicsOrgasmic dysfunctionOrgasmic dysfunction is when a woman either cannot reach orgasm, or has trouble reaching orgasm when she is sexually excited. When sex is not enjoyable, it can become a chore instead of a satisfying, intimate...

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Diseases & ConditionsPanic disorderPanic disorder is a type of anxiety disorder in which you have repeated attacks of intense fear that something bad will happen.

Diseases & ConditionsParanoid personality disorderParanoid personality disorder is a mental condition in which a person has a long-term pattern of distrust and suspicion of others. The person does not have a full-blown psychotic disorder, such as schizophrenia...

Diseases & ConditionsPersistent depressive disorderPersistent depressive disorder is a chronic (ongoing) type of depression in which a person's moods are regularly low. But, symptoms are not as severe as with major depression. chronic Persistent depressive...

Diseases & ConditionsPersonality disordersPersonality disorders are a group of mental conditions in which a person has a long-term pattern of behaviors, emotions, and thoughts that is very different from his or her culture's expectations. These...

Diseases & ConditionsPhobia - simple/specificA phobia is an ongoing intense fear or anxiety of a certain object, animal, activity, or setting that poses little to no actual danger.

Diseases & ConditionsPhonological disorderPhonological disorder is a type of speech disorder known as an articulation disorder. Children with phonological disorder do not use some or all of the speech sounds expected for their age group.

Diseases & ConditionsPicaPica is a pattern of eating non-food materials, such as dirt or paper.

Diseases & ConditionsPost-traumatic stress disorderPost-traumatic stress disorder (PTSD) is a type of anxiety disorder. It can occur after you have gone through an extreme emotional trauma that involved the threat of injury or death. anxiety disorder

Diseases & ConditionsPsychosisPsychosis occurs when a person loses contact with reality. The person may: Have false beliefs about what is taking place, or who one is (delusions)See or hear things that are not there (hallucinations)...

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Special TopicsRape (sexual assault) - overview
Rape is defined as a sexual act forced on a person against his or her will. It may involve physical force or the threat of force. It may also be done against someone who is unable to give consent. Sexual...

Self-Care InstructionsRecognizing teen depression1 in 5 teenagers have depression at some point. Your teen may be depressed if they are feeling sad, blue, unhappy, or down in the dumps. Depression is a serious problem, even more so if these feelings have...

Diseases & ConditionsRumination disorderRumination disorder is a condition in which a person keeps bringing up food from the stomach into the mouth (regurgitation) and rechewing the food.

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Diseases & ConditionsSchizoaffective disorderSchizoaffective disorder is a mental condition that causes both a loss of contact with reality (psychosis) and mood problems (depression or mania). psychosis

Diseases & ConditionsSchizoid personality disorderSchizoid personality disorder is a mental condition in which a person has a lifelong pattern of indifference to others and social isolation.

Diseases & ConditionsSchizophreniaSchizophrenia is a mental disorder that makes it hard to tell the difference between what is real and not real. It also makes it hard to think clearly, have normal emotional responses, and act normally...

In-depth ReportSchizophreniaAn in-depth report on the causes, diagnosis, and treatment of schizophrenia

Diseases & ConditionsSchizotypal personality disorderSchizotypal personality disorder is a mental condition in which a person has trouble with relationships and disturbances in thought patterns, appearance, and behavior.

Diseases & ConditionsSeasonal affective disorderSeasonal affective disorder (SAD) is a type of depression that occurs at a certain time of the year, usually in winter.

Diseases & ConditionsSelective mutismSelective mutism is a condition in which a child can speak, but then they suddently stop speaking. It most often takes place in school or social settings.

Diseases & ConditionsSocial anxiety disorderSocial anxiety disorder is a persistent and irrational fear of situations that may involve scrutiny or judgment by others, such as at parties and other social events.

Diseases & ConditionsSomatic symptom disorderSomatic symptom disorder occurs when a person feels extreme anxiety about physical symptoms such as pain or fatigue. The person has intense thoughts, feelings, and behaviors related to the symptoms that...

In-depth ReportStress
An in-depth report on the causes, diagnosis, treatment, and prevention of stress.

SymptomsStress and your healthStress is a feeling of emotional or physical tension. It can come from any event or thought that makes you feel frustrated, angry, or nervous. Stress is your body's reaction to a challenge or demand. In...

Special TopicsSubstance useSubstance use is the continued use of alcohol, illegal drugs, or the misuse of prescription or over-the-counter drugs with negative consequences. These consequences may involve: Substance use Problems at...

Diseases & ConditionsSubstance use disorderSubstance use disorder occurs when a person's use of alcohol or another substance (drug) leads to health issues or problems at work, school, or home. This disorder is also called substance abuse.

Diseases & ConditionsSuicide and suicidal behaviorSuicide is the act of taking one's own life on purpose. Suicidal behavior is any action that could cause a person to die, such as taking a drug overdose or crashing a car on purpose.

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Diseases & ConditionsTrichotillomaniaTrichotillomania is hair loss from repeated urges to pull or twist the hair until it breaks off. People are unable to stop this behavior, even as their hair becomes thinner.